SSB index indication method, communication device and computer readable storage medium

Abstract

The invention provides an SSB index indication method, a communication device and a computer readable storage medium, and relates to the technical field of communication. In the method, a base station sends an SSB comprising a PBCH and a demodulation reference signal of the PBCH to a terminal device, and the PBCH and the demodulation reference signal indicate an SSB index in a preset mode. And when the bit number of the SSB index is greater than the first preset bit number, jointly indicating the SSB index through M first bits and N second bits in the additional load bits of the PBCH and the demodulation reference signal. According to the invention, on the premise of not increasing extra resource occupation, the indication range of the SSB index is obviously expanded, the channel utilization efficiency is improved, the problem of limited expansibility caused by insufficient indication bit width of the SSB index is effectively relieved, the requirement of a 5GNR network for more SSB index indications in high-frequency-band communication and complex scenes is met, and the service life of the 5GNR network is prolonged. And technical support is provided for efficient operation of a future network.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a SSB index indication method, a communication device and a computer-readable storage medium. Background Art

[0002] With the development of New Radio (NR) technology in the fifth generation mobile communication technology (5G) network, the base station can send multiple SSBs with different indexes within one synchronization signal block (Synchronization Signal and PBCH block, SSB) period. Multiple SSBs can cover different time resources, frequency resources and wave positions, thereby improving communication performance.

[0003] With the introduction of non-terrestrial network (NTN) technology, the number of wave positions that need to be covered in each cell has increased dramatically, which has led to a significant increase in the number of SSBs that need to be indicated by SSB indexes. In the existing SSB index indication method, the lower three bits of the SSB index are implicitly indicated by the scrambling sequence of the demodulation reference signal (DM-RS) of the physical broadcast channel (PBCH), and the upper three bits of the SSB index are displayed through the additional payload bits of the PBCH. Therefore, this method supports up to 64 SSB indexes. However, with the further increase in the number of SSBs, the existing SSB index indication method is difficult to meet the indication requirements of a larger number of SSB indexes, which seriously limits the application capabilities of 5G networks in more complex scenarios.

[0004] Therefore, in the SSB index indication process, the limited scalability of existing SSB index indication methods and their insufficient applicability in complex scenarios have become problems that need to be solved urgently. Summary of the invention

[0005] The present application provides an SSB index indication method, a communication device and a computer-readable storage medium to solve the problems of limited scalability and insufficient applicability of existing SSB index indication methods in complex scenarios.

[0006] In a first aspect, the present application provides a SSB index indication method, the method comprising:

[0007] The base station sends a synchronization signal block SSB to the terminal device, where the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate an SSB index corresponding to the SSB in a preset manner;

[0008] Among them, when the number of bits of the SSB index is greater than the first preset number of bits, the preset method is: the SSB index is jointly indicated by M first bits, N second bits and the demodulation reference signal; the M first bits and the N second bits are bits in the additional payload bits of the PBCH, M is 1 or 2, and N is 3.

[0009] In one possible design, the base station sends a synchronization signal block SSB to the terminal device, including:

[0010] When the start time of the SSB cycle is aligned with the target time, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode, so that the terminal device determines the SSB index, half-frame number and the lowest bit of the system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle; wherein the target time is a time associated with the start time of the system frame and / or the half-frame of the system frame.

[0011] In one possible design, before the base station sends a synchronization signal block SSB to the terminal device, the method further includes:

[0012] The base station sends indication information to the terminal device, and the indication information is used to indicate the purpose of the M first bits; wherein the purpose of the first bit includes: the first bit is used to indicate the lowest bit or half-frame number of the system frame number, or the first bit is used to indicate the SSB index.

[0013] In a possible design, when M is 1 and the first bit is the 5th bit of the additional payload bit, the target time is the start time of the first half frame of the system frame, or the start time of the second half frame of the system frame;

[0014] When M is 1 and the first bit is the 4th bit of the additional payload bit, the target time is the start time of any half frame of the first system frame, or the start time of any half frame of the second system frame; wherein the first system frame is the system frame with an even system frame number, and the second system frame is the system frame with an odd system frame number;

[0015] When M is 2, and one of the first bits is the 5th bit and the other of the first bits is the 4th bit, the target time is the starting time of the first half frame of the first system frame, the starting time of the second half frame of the first system frame, the starting time of the first half frame of the second system frame, or the starting time of the second half frame of the second system frame.

[0016] In a second aspect, the present application provides a SSB index indication method, the method comprising:

[0017] The terminal device receives a synchronization signal block SSB sent by a base station, wherein the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate an SSB index corresponding to the SSB in a preset manner;

[0018] Among them, when the number of bits of the SSB index is greater than the preset number of bits, the preset method is: the SSB index is jointly indicated by M first bits, N second bits and the demodulation reference signal; the M first bits and the N second bits are bits in the additional payload bits of the PBCH, M is 1 or 2, and N is 3.

[0019] In one possible design, the SSB is sent by the base station to the terminal device based on the SSB cycle and the target SSB mode when the start time of the SSB cycle is aligned with the target time; wherein the target time is a time associated with the start time of the system frame and / or the half frame of the system frame.

[0020] In one possible design, after the terminal device receives a synchronization signal block SSB sent by the base station, the method further includes:

[0021] The terminal device determines the lowest bit of the SSB index, half-frame number and system frame number corresponding to the SSB based on the SSB, the target SSB mode and the starting time of the SSB cycle.

[0022] In one possible design, the terminal device determines the lowest bit of the SSB index, the half-frame number, and the system frame number corresponding to the SSB based on the SSB, the target SSB mode, and the start time of the SSB cycle, including:

[0023] The terminal device determines the SSB index corresponding to the SSB based on the PBCH and the demodulation reference signal of the SSB;

[0024] The terminal device determines the relative position of the SSB based on the target SSB pattern;

[0025] The terminal device determines the number of the half frame and the number of the system frame corresponding to the SSB in the SSB period according to the relative position of the SSB;

[0026] The terminal device determines the lowest bit of the half-frame number and the system frame number corresponding to the SSB based on the start time of the SSB cycle, and the number of the half-frame and the system frame number corresponding to the SSB in the SSB cycle.

[0027] In a possible design, when M is 1 and the first bit is the 5th bit of the additional payload bit, the target time is the start time of the first half frame of the system frame, or the start time of the second half frame of the system frame;

[0028] When M is 1 and the first bit is the 4th bit of the additional payload bit, the target time is the start time of any half frame of the first system frame, or the start time of any half frame of the second system frame; wherein the first system frame is the system frame with an even system frame number, and the second system frame is the system frame with an odd system frame number;

[0029] When M is 2, and one of the first bits is the 5th bit and the other of the first bits is the 4th bit, the target time is the starting time of the first half frame of the first system frame, the starting time of the second half frame of the first system frame, the starting time of the first half frame of the second system frame, or the starting time of the second half frame of the second system frame.

[0030] In a third aspect, the present application provides a communication device, comprising: a module for executing the embodiment of the method of the first aspect, or a module for executing the embodiment of the method of the second aspect.

[0031] In a fourth aspect, the present application provides a communication system, comprising: a base station for executing the method in the above-mentioned first aspect and any possible design of the first aspect, and a terminal device for executing the method in the above-mentioned second aspect and any possible design of the second aspect.

[0032] In a fifth aspect, the present application provides an electronic device, comprising: a memory and at least one processor;

[0033] Memory stores computer-executable instructions;

[0034] At least one processor executes computer-executable instructions stored in the memory, so that at least one processor executes the method of the first aspect, various possible designs of the first aspect, the second aspect, or various possible designs of the second aspect as described above.

[0035] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed, the method of the first aspect, various possible designs of the first aspect, the second aspect, or various possible designs of the second aspect is implemented.

[0036] In the seventh aspect, the present application provides a computer program product, which includes computer program code. When the computer program code runs on a computer, the computer implements the first aspect, various possible designs of the first aspect, the second aspect, or the method of various possible designs of the second aspect.

[0037] In an eighth aspect, the present application provides a chip, comprising: an interface circuit and a logic circuit, the interface circuit being used to receive signals from other chips outside the chip and transmit them to the logic circuit, or to send signals from the logic circuit to other chips outside the chip, and the logic circuit being used to implement methods such as the first aspect, various possible designs of the first aspect, the second aspect, or various possible designs of the second aspect.

[0038] The embodiments of the present application provide an SSB index indication method, a communication device, and a computer-readable storage medium. In the SSB index indication method, the base station sends an SSB to a terminal device, and the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate the SSB index corresponding to the SSB in a preset manner. When the number of bits of the SSB index is greater than the first preset number of bits, the preset method is to indicate the SSB index through the M first bits and N second bits in the additional payload bits of the PBCH, and the demodulation reference signal. Without increasing the occupancy of additional resources, the indication range of the SSB index is significantly expanded, the channel utilization efficiency is improved, and the problem of limited scalability caused by insufficient width of the SSB index indication bit is effectively alleviated. It meets the needs of the 5G NR network for more SSB index indication capabilities in high-frequency band communications and complex scenarios, and provides technical support for the efficient operation of future networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flowchart of a SSB index indication method provided in an embodiment of the present application;

[0040] Figure 2 A flowchart of another SSB index indication method provided in an embodiment of the present application;

[0041] Figure 3 A flowchart of another SSB index indication method provided in an embodiment of the present application;

[0042] Figure 4A schematic diagram of the relationship between an SSB period, an SSB index, a half-frame number and a system frame provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the relationship between an SSB period, an SSB index, a half-frame number, a system frame, and the lowest bit of the system frame number provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0045] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B can exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0051] In the description of this application, unless otherwise specified, "multiple" and "at least two" mean more than two (including two). Similarly, "multiple groups" and "at least two groups" mean more than two groups (including two).

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, "connected" or "connection" can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In order to make those skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings. It should be noted that different technical features in the present application can be combined with each other without conflict.

[0054] First, the terms involved in one or more embodiments of this specification are explained.

[0055] System Frame is the basic time period in wireless communication system. Each system frame consists of 10 subframes. The duration of each system frame is 10 milliseconds, and the duration of each subframe is 1 millisecond.

[0056] The system frame number (SFN) is used to identify the position of the current system frame. The system frame number is a 10-bit number ranging from 0 to 1023 and is used to identify the number of the system frame.

[0057] Half-Frame is a sub-unit of the system frame, which represents half of the system frame. Each system frame consists of two half-frames, and the duration of each half-frame is 5 milliseconds. The role of half-frame is mainly reflected in more precise timing control, especially for scenarios that require higher time synchronization accuracy.

[0058] The half-frame number is used to identify the half-frame position in the system frame to provide more accurate time synchronization. The two half-frames in each system frame are half-frame 0 and half-frame 1. The half-frame number of half-frame 0 is 0, and the half-frame number of half-frame 1 is 1.

[0059] The synchronization signal block SSB is an important physical signal block in the 5G NR network, consisting of the synchronization signal (SS) and the physical broadcast channel PBCH. SSB is a key signal block that the terminal device needs to capture when it first accesses the network. SSB provides the terminal device with the initial synchronization information and cell configuration data required to complete the access. The synchronization signal SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). The synchronization signal SS is used to carry time and frequency synchronization information to assist the terminal device in completing cell identification.

[0060] The physical broadcast channel PBCH is used to carry basic broadcast information, such as system frame number, subcarrier spacing, cell identity and other necessary system information. The information carried by PBCH is used to help terminal devices complete initial synchronization and cell access.

[0061] The demodulation reference signal (DM-RS) is used for channel estimation and derivation of channel quality and spatial characteristics during data demodulation.

[0062] A base station may be an evolved NodeB (eNB or eNodeB) in a Long Term Evolution (LTE) communication system, or a next generation NodeB (gNB) in a 5G communication system, or a network side device in a network communication system after the 5G communication system, or a network device in a future evolved public land mobile network (PLMN).

[0063] Terminal equipment includes equipment that provides voice and / or data connectivity to users, such as a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal equipment can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal equipment may include terminal equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle-to-everything (V2X) terminal equipment, machine-to-machine / machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit (subscriberunit), subscriber station (subscriber station), mobile station (mobile station), remote station (remotestation), access point (AP), remote terminal (remote terminal), access terminal (accessterminal), user terminal (user terminal), user agent (user agent), or user equipment (userdevice), etc. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. For example, a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as bar codes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners, etc., which are not specifically limited in the embodiments of the present application.

[0064] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, etc., which are a general term for the application of wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-size, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0065] The various terminal devices introduced above, if located on a vehicle (eg, placed in or installed in a vehicle), can be considered as vehicle-mounted terminal devices, which are also called on-board units (OBU).

[0066] The following is an introduction to the implementation background of the technical solution provided in the embodiments of the present application.

[0067] The 3rd Generation Partnership Project (3GPP) NR system has a radio frame with a time domain length of 10ms. Each radio frame is divided into 10 subframes of the same size and a length of 1ms. Depending on the subcarrier spacing, each subframe can contain multiple time slots. Each time slot consists of a certain number of symbols, and the number of symbols is determined by the cyclic prefix (CP) type.

[0068] The NR system supports the transmission of multi-beam synchronization signals SS and physical broadcast channels PBCH. The position of the synchronization signal block SSB in the search window is related to the sub-carrier space (SCS) and the number of beams L. Multiple candidate SSBs constitute a candidate SSB set. The maximum number of candidate SSBs that can be sent in the candidate SSB set is recorded as LbarMax. Depending on the SSB configuration, LbarMax can be 4, 8, 10, 20 or 64.

[0069] In 5G NR technology, the base station can send multiple candidate SSBs with different indexes within one SSB cycle. The multiple candidate SSBs occupy different time resources and point to different beam directions. Each beam direction can cover a beam footprint, thereby obtaining the benefits of high-gain beams on link budget while taking into account the area coverage of the entire cell.

[0070] With the proposal and development of the NTN technology of 5G NR, the number of wave positions that need to be covered in each cell has increased dramatically, which has led to a significant increase in the number of candidate SSBs that need to be indicated by candidate SSB indexes. In the prior art, the numerical range of the candidate SSB index is 0 to LbarMax-1, and the candidate SSB index usually requires 2 to 6 bits to indicate. When the bit width (bit width) of the candidate SSB index is 2 bits or 3 bits, it is implicitly indicated by the scrambling sequence of the demodulation reference signal DM-RS; when the bit width of the candidate SSB index is 4 bits, 5 bits or 6 bits, the lower three bits of the candidate SSB index, that is, the 1st, 2nd and 3rd bits from low to high are still implicitly indicated by the scrambling sequence of the demodulation reference signal DM-RS, and the 4th, 5th (if any), and 6th (if any) of the candidate SSB index are indicated by the 8th, 7th and 6th bits of the additional payload bits of the PBCH, respectively.

[0071] The payload of PBCH consists of two parts: one is the Master Information Block (MIB) payload, which is 24 bits in total, and the other is the additional payload bit, which is 8 bits in total. The 8 bits of the additional payload bit include the 4-bit lower 4 bits of the system frame number, 1-bit half-frame indication, and 3-bit candidate SSB index indication.

[0072] Specifically, the 8 bits of the additional payload bits are respectively the first bit Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 and the 8th bit Among them, the first bit of the additional payload bit Bit 2 Bit 3 and the 4th bit Used to indicate the lower 4 bits of the system frame number, the 4th bit The first least significant bit used to indicate the system frame number; the fifth bit of the additional payload bit Used to indicate the half-frame number; the 6th bit of the additional payload bit Bit 7 and the 8th bit Used to indicate candidate SSB index.

[0073] When the bit width of the candidate SSB index is 4 bits, the 8th bit of the additional payload bit is used to Indicates the 4th bit of the candidate SSB index from low to high; when the bit width of the candidate SSB index is 5 bits, the 8th bit of the additional payload bit is used Indicates the candidate SSB index from low to high in the 4th bit and adds the payload bit in the 7th bit Indicates the 5th bit of the candidate SSB index from low to high; when the bit width of the candidate SSB index is 6 bits, the 8th bit of the additional payload bit is used Indicates the candidate SSB index from low to high bit 4, indicates the candidate SSB index from low to high bit 5 through the additional payload bit 7, and indicates the candidate SSB index from low to high bit 6 through the additional payload bit Indicates the 6th bit of the candidate SSB index from low to high.

[0074] In summary, the existing SSB index indication method supports indicating up to 64 SSB indexes. However, as the number of SSBs increases, the existing SSB index indication method is difficult to meet the indication requirements of a larger number of SSB indexes, and has limited scalability, which seriously limits the application capabilities of 5G networks in more complex scenarios.

[0075] Based on the problems existing in the related art, the embodiments of the present application provide an SSB index indication method, a communication device and a computer-readable storage medium. In the SSB index indication method, the base station sends an SSB to the terminal device, and the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate the SSB index corresponding to the SSB in a preset manner. When the number of bits of the SSB index is greater than the first preset number of bits, the preset method is to indicate the SSB index through the M first bits and N second bits in the additional payload bits of the PBCH, and the demodulation reference signal. Without increasing the occupancy of additional resources, the indication range of the SSB index is significantly expanded, the channel utilization efficiency is improved, and the problem of limited scalability caused by insufficient width of the SSB index indication bit is effectively alleviated. It meets the needs of the 5G NR network for more SSB index indication capabilities in high-frequency band communications and complex scenarios, and provides technical support for the efficient operation of future networks.

[0076] Next, some specific embodiments and drawings are used to describe in detail how the present application solves the problems of limited scalability of the above-mentioned existing SSB index indication methods and insufficient applicability in complex scenarios.

[0077] Figure 1 A flow chart of a SSB index indication method provided in an embodiment of the present application. Figure 1 As shown, the SSB index indication method provided in the embodiment of the present application specifically includes S101, and S101 is described in detail below.

[0078] S101, a base station sends a synchronization signal block SSB to a terminal device. Correspondingly, the terminal device receives the SSB sent by the base station.

[0079] Among them, SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate the SSB index corresponding to the SSB in a preset manner.

[0080] It should be noted that the synchronization signal block SSB sent by the base station to the terminal device specifically includes the primary synchronization signal PSS, the secondary synchronization signal SSS, the physical broadcast channel PBCH and the demodulation reference signal DM-RS of the PBCH.

[0081] An SSB cycle may contain multiple SSBs, and each of the multiple SSBs has its corresponding SSB index. Each SSB index is used to uniquely identify the position of an SSB in the SSB cycle.

[0082] For any SSB, the SSB indicates the SSB index of the SSB through the PBCH and demodulation reference signal it contains.

[0083] It should be noted that the preset methods corresponding to SSB indexes of different bit numbers are different.

[0084] In one embodiment of the present application, when the number of bits of the SSB index is greater than the first preset number of bits, the preset method is: the SSB index is jointly indicated by M first bits, N second bits and a demodulation reference signal.

[0085] The M first bits and the N second bits are bits in the additional payload bits of the PBCH.

[0086] It should be noted that M is 1 or 2, and N is 3.

[0087] Furthermore, the values ​​of M and N can also be set by the user.

[0088] When M is 1, the first bit is the 4th bit of the additional payload bit of PBCH Or the 5th bit of the additional payload bit of PBCH

[0089] When M is 2, one of the two first bits is the 4th bit of the additional payload bit of the PBCH. Another first bit is the 5th bit of the additional payload bit of PBCH

[0090] When N is 3, the N second bits are the 6th bit of the additional payload bit of the PBCH. The 7th bit of the additional payload bit of PBCH and the 8th bit of the additional payload bit of the PBCH

[0091] It should be noted that the first preset number of digits is 6 digits.

[0092] When indicating any SSB index, the maximum number of bits that the N second bits and the demodulation reference signal can support indicating is the first preset number of bits. Therefore, when the number of bits of the SSB index is greater than the first preset number of bits, it is necessary to use the M first bits in the additional payload bits, the N second bits, and the demodulation reference signal to jointly indicate the SSB index according to the number of bits of the SSB index.

[0093] It should be noted that when the M first bits, N second bits and the demodulation reference signal in the additional payload bits are used to jointly indicate the SSB index, the 1st, 2nd and 3rd bits of the SSB index from low to high are implicitly indicated by the scrambling sequence of the demodulation reference signal, the 4th, 5th and 6th bits of the SSB index from low to high are indicated by 3 second bits, and the 7th bit of the SSB index from low to high is indicated by 1 first bit, or the 7th and 8th bits of the SSB index from low to high are indicated by 2 first bits. The bits in the additional payload bits that do not indicate the SSB index are still used to indicate the content that they originally need to indicate.

[0094] Among them, the method of implicitly indicating the 1st, 2nd and 3rd bits of the SSB index from low to high through the scrambling sequence of the demodulation reference signal, and the method of indicating the 4th, 5th and 6th bits of the SSB index from low to high through N second bits are both existing methods and will not be described in detail in this embodiment.

[0095] For example, when the number of bits of the SSB index is 7, M is 1, and the first bit can be the 4th bit. Or the 5th bit

[0096] When M is 1, and the first bit is the 4th bit In the case of Bit 6 Bit 7 Bit 8 The demodulation reference signal indicates the SSB index together. It no longer indicates the lowest bit of the system frame number that it originally needs to indicate, but is used to indicate the 7th bit and the 5th bit of the SSB index from low to high. Still used to indicate the half-frame number it was originally intended to indicate.

[0097] When M is 1, and the first bit is the 5th bit In the case of Bit 6 Bit 7 Bit 8 The demodulation reference signal indicates the SSB index together. Still used to indicate the lowest bit of the system frame number that it originally needed to indicate, the 5th bit It no longer indicates the half-frame number that it was supposed to indicate, but is used to indicate the 7th bit of the SSB index from low to high.

[0098] For another example, when the number of bits of the SSB index is 8, M is 2, and the first bit is the 4th bit. Another first bit is the 5th bit At this time, the default method is: through the 4th bit Bit 5 Bit 6 Bit 7 Bit 8 The 4th bit indicates the SSB index together with the demodulation reference signal. It no longer indicates the lowest bit of the system frame number that it originally needs to indicate, but is used to indicate the 7th or 8th bit of the SSB index from low to high, the 5th bit It no longer indicates the half-frame number that it was supposed to indicate, but is used to indicate the 8th or 7th bit of the SSB index from low to high.

[0099] In this embodiment, the method of indicating the SSB index through N second bits and a demodulation reference signal fully complies with the provisions of the existing protocol, and there is no need to change the existing decoding logic and signal structure. The innovation of this method is that when the number of bits of the SSB index is greater than the first preset number of bits, 1 first bit or 2 first bits in the additional payload bits are flexibly introduced to indicate the higher bits of the SSB index, so as to achieve the indication of SSB indexes with more bits. This method only adjusts the use of 1 or 2 first bits in the additional payload bits without changing the basic framework of the existing SSB index indication method. It is fully compatible with the existing protocol logic, and while expanding the range of SSB index indication, it minimizes the cost of modifying existing protocols and equipment, significantly enhancing the practicality and promotion of this method.

[0100] In another embodiment of the present application, when the number of bits of the SSB index is less than or equal to the first preset number of bits and greater than the second preset number of bits, the preset method is: the SSB index is jointly indicated by all or part of the N second bits and the demodulation reference signal.

[0101] The second preset number of digits is smaller than the first preset number of digits, and the second preset number is 3 digits.

[0102] It should be noted that when indicating any SSB index, the maximum number of bits that the demodulation reference signal can support is 3 bits. Therefore, when the number of bits of the SSB index is greater than 3 bits and less than or equal to 6 bits, it is necessary to use the 3 second bits (the 6th bit) of the additional payload bit according to the number of bits of the SSB index. Bit 7 and the 8th bit ) and part or all of the demodulation reference signal together indicate the SSB index.

[0103] When the number of bits of the SSB index is greater than 3 bits and less than or equal to 6 bits, the method of jointly indicating the SSB index through all or part of the N second bits and the demodulation reference signal is an existing method and will not be repeated in this embodiment.

[0104] In another embodiment of the present application, when the number of bits of the SSB index is less than or equal to the second preset number of bits, the preset method is: indicating the SSB index through a demodulation reference signal.

[0105] It should be noted that when the number of bits of the SSB index is less than or equal to 3 bits, the SSB index can be indicated only by the demodulation reference signal.

[0106] When the number of bits of the SSB index is less than or equal to 3 bits, the method of indicating the SSB index through a demodulation reference signal is an existing method and will not be described in detail in this embodiment.

[0107] The embodiment of the present application provides an SSB index indication method, in which a base station sends an SSB to a terminal device, and the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate the SSB index corresponding to the SSB in a preset manner. When the number of bits of the SSB index is greater than the first preset number of bits, the preset method is to indicate the SSB index through the M first bits and the N second bits in the additional payload bits of the PBCH, and the demodulation reference signal. Without increasing the occupancy of additional resources, the indication range of the SSB index is significantly expanded, the channel utilization efficiency is improved, and the problem of limited scalability caused by insufficient width of the SSB index indication bit is effectively alleviated. The demand for more SSB index indication capabilities of the 5G NR network in high-frequency band communications and complex scenarios is met, and technical support is provided for the efficient operation of future networks.

[0108] In the above embodiment, the base station needs to send a synchronization signal block SSB to the terminal device. Next, the specific process of the base station sending the synchronization signal block SSB to the terminal device is described in detail.

[0109] In a possible embodiment, the method steps shown in S101 can be implemented by Sa, which is described in detail below.

[0110] Sa. When the start time of the SSB cycle is aligned with the target time, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode, so that the terminal device determines the SSB index, half-frame number and the lowest bit of the system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle.

[0111] The target time is a time associated with the start time of the system frame and / or a half frame of the system frame.

[0112] It should be noted that, after passing through the 3 second bits and the demodulation reference signal, and the 4th bit and / or bit 5 When the SSB index is indicated together, the 4th bit and / or bit 5 is reallocated to indicate the higher-order SSB index, so that the 4th bit is used to indicate the higher-order SSB index. and / or bit 5 When indicating the SSB index, other methods are required to indicate the lowest bit of the half-frame number and / or system frame number.

[0113] The lowest bit of the half-frame number and the system frame number is information related to the system frame, which directly affects the time synchronization of the terminal device. Therefore, the base station can be controlled to send SSB to the terminal device based on the SSB cycle and the target SSB mode when the start time of the SSB cycle is aligned with the target time, so that the terminal device can indirectly deduce the lowest bit of the half-frame number and / or the system frame number corresponding to the SSB according to the target SSB mode and the start time of the SSB cycle, as well as the received SSB.

[0114] Among them, the target SSB mode is related to the application conditions of SSB.

[0115] The SSB mode is a specific regulation on the time distribution of candidate SSBs within an SSB cycle. The SSB mode determines the layout of SSBs in the time domain.

[0116] The application conditions of SSB refer to the current operating environment and configuration requirements of the network. The application conditions of SSB include network type, subcarrier spacing SCS, carrier frequency, spectrum operation mode (paired spectrum or unpaired spectrum), shared spectrum channel access (such as specific resource constraints in shared spectrum scenarios), etc.

[0117] It should be noted that the base station can dynamically select a target SSB mode suitable for the current application conditions from multiple SSB modes according to the current SSB application conditions, and send SSB to the terminal device based on the target SSB mode.

[0118] The SSB period refers to the period of repeated broadcasting of SSB at fixed time intervals in the 5G NR system.

[0119] It should be noted that in one SSB cycle, the base station may transmit multiple SSBs, and each SSB has a unique SSB index, which is used to identify its position in the SSB cycle. Multiple SSBs are distributed in time according to the target SSB mode, and different target SSB modes define the specific time position of the SSB in the SSB cycle.

[0120] The duration of the SSB cycle is determined by the network configuration. Typical values ​​include 5ms, 10ms, 20ms, 40ms, 80ms, etc.

[0121] In the embodiment of the present application, by controlling the base station to send SSB to the terminal device in combination with the SSB cycle and the target SSB mode when the start time of the SSB cycle is aligned with the target time, the terminal device can accurately parse the SSB index, half frame number and the lowest bit of the system frame number corresponding to the SSB based on the start time of the SSB cycle and the target SSB mode, as well as the received SSB. This method utilizes the alignment characteristics of the start time of the SSB cycle and the start time of the system frame, and does not need to be in the 4th bit. and / or bit 5 When it is reallocated to indicate a higher-order SSB index, additional resources are used to display the lowest bit and / or half-frame number indicating the system frame number, thereby effectively reducing resource overhead and improving signal transmission efficiency.

[0122] In the above embodiment, when the number of bits of the SSB index is less than or equal to the first preset number of bits, the two first bits (the fourth bit) and the 5th bit ) is used to indicate the content that it originally needs to indicate; when the number of bits of the SSB index is greater than the first preset number of bits, the M first bits (the 4th bit) and / or bit 5 ) is reallocated to indicate a higher-order SSB index and no longer indicates the content it was originally required to indicate. However, when receiving the SSB, the terminal device may not be able to clearly identify the current purpose of the M first bits, which in turn causes the terminal device to be unable to correctly parse the SSB index, half-frame number, and lowest bit of the system frame number corresponding to the SSB. Therefore, before the base station sends the synchronization signal block SSB to the terminal device, the terminal device needs to obtain the current purpose of the M first bits so that the terminal device can subsequently correctly parse the lowest bit of the SSB index, half-frame number, and system frame number corresponding to the SSB. Next, the specific process of the terminal device obtaining the current purpose of the M first bits is described in detail.

[0123] Figure 2 A flow chart of another SSB index indication method provided in an embodiment of the present application. Figure 2 As shown, in a possible embodiment, before S101, the SSB index indication method also includes Sc, which is described in detail below.

[0124] Sc. The base station sends indication information to the terminal device. Correspondingly, the terminal device receives the indication information sent by the base station.

[0125] The indication information is used to indicate the purpose of the M first bits.

[0126] It should be noted that the uses of the first bit include: the first bit is used to indicate the lowest bit or half-frame number of the system frame number, or the first bit is used to indicate the SSB index.

[0127] Specifically, the indication information may be one of indication information 1, indication information 2, indication information 3, indication information 4 and indication information 5.

[0128] When the number of bits of the SSB index is less than or equal to 6 bits, the indication information adopts indication information 1, and the content of indication information 1 is: the 4th bit The lowest bit used to indicate the system frame number, bit 5 Used to indicate the half-frame number.

[0129] When the number of bits of the SSB index is 7, M is 1, and the first bit is the 4th bit In the case of, the indication information adopts indication information 2, and the content of indication information 2 is: the 4th bit The 7th bit and the 5th bit are used to indicate the SSB index from low to high. Used to indicate the half-frame number.

[0130] When the number of bits of the SSB index is 7, M is 1, and the first bit is the 5th bit In the case of, the indication information adopts indication information 3, and the content of indication information 3 is: the 4th bit The lowest bit used to indicate the system frame number, bit 5 Used to indicate the 7th bit of the SSB index from low to high.

[0131] The number of bits of the SSB index is 8, M is 2, and the 4th bit The 7th bit and the 5th bit are used to indicate the SSB index from low to high. When used to indicate the 8th bit of the SSB index from low to high, the indication information adopts indication information 4, and the content of indication information 4 is: the 4th bit The 7th bit and the 5th bit are used to indicate the SSB index from low to high. Used to indicate the 8th bit of the SSB index from low to high.

[0132] The number of bits of the SSB index is 8, M is 2, and the 5th bit The 7th bit, 4th bit, used to indicate the SSB index from low to high In the case of indicating the 8th bit of the SSB index from low to high, the indication information adopts indication information 5, and the content of indication information 5 is: the 5th bit The 7th bit, 4th bit, used to indicate the SSB index from low to high Used to indicate the 8th bit of the SSB index from low to high.

[0133] In this embodiment, the base station sends an indication message to the terminal device to clearly inform the terminal device of the current use of the M first bits, so that the terminal device adjusts the decoding logic according to the received indication information, ensuring that the terminal device can correctly parse the SSB index, half-frame number and the lowest bit of the system frame number corresponding to the SSB, thereby effectively improving the accuracy and stability of communication between the base station and the terminal device.

[0134] In another possible embodiment, before S101, the base station may also pre-agree with the terminal device on the usage of the M first bits through a protocol.

[0135] When the base station and the terminal device establish a connection or initialize, the purpose of the M first bits is pre-agreed through a protocol.

[0136] Specifically, when the purpose of the M first bits is pre-agreed through a protocol, the purpose of the M first bits can be agreed upon by referring to the contents and application conditions of indication information 1, indication information 2, indication information 3, indication information 4 and indication information 5 in the above embodiments, and this embodiment will not go into details.

[0137] It should be noted that when the number of bits of the SSB index is 7, the 4th bit can be pre-set and the 5th bit Priority between.

[0138] For example, when the number of bits of the SSB index is 7, the 5th bit The priority is higher than the 4th bit That is, when the number of bits of the SSB index is 7, the 4th bit is used first. Indicates the lowest bit of the system frame number and uses the 5th bit Indicates the 7th bit of the SSB index from low to high.

[0139] In this embodiment, when the base station and the terminal device are connected or initialized, the fourth bit is pre-agreed by the protocol. and the 5th bit The purpose of this method is to dynamically adapt to the needs of different SSB index bits. This method does not require the base station to send additional indication information, reduces signaling overhead, and significantly improves communication efficiency; at the same time, through the protocol agreed rules, it guarantees the adaptability of terminal equipment to different scenarios, takes into account resource utilization efficiency and protocol compatibility, and provides a technical basis for supporting more complex network scenarios.

[0140] In the above embodiment, when the start time of the SSB cycle is aligned with the target time, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode, so that the terminal device can determine the SSB index, half-frame number and the lowest bit of the system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle. Next, the specific process of the terminal device determining the lowest bit of the SSB index, half-frame number and system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle is described in detail.

[0141] like Figure 2 As shown, in a possible embodiment, after the method steps shown in Sa above, the SSB index indication method also includes S102, and S102 is described in detail below.

[0142] S102. The terminal device determines the lowest bit of the SSB index, half-frame number and system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle.

[0143] In a possible implementation, when the number of bits of the SSB index is 8 bits, S102 can be implemented through S1021 to S1024, and S1021 to S1024 are described in detail below.

[0144] S1021. The terminal device determines the SSB index corresponding to the SSB based on the PBCH and demodulation reference signal of the SSB.

[0145] It should be noted that the terminal device parses the additional payload bits and demodulation reference signal of the PBCH based on the indication information or the pre-agreed purpose of the M first bits, and can obtain the SSB index corresponding to the SSB.

[0146] Specifically, the terminal device parses the demodulation reference signal to obtain the first, second, and third bits from low to high corresponding to the SSB index; the terminal device parses the eighth bit of the additional payload bit. (second bit) is parsed to obtain the 4th bit from low to high corresponding to the SSB index, and the terminal device calculates the 7th bit of the additional payload bit (second bit) is parsed to obtain the 5th bit from low to high corresponding to the SSB index, and the terminal device calculates the 6th bit of the additional payload bit (the second bit) is parsed to obtain the sixth bit from low to high corresponding to the SSB index.

[0147] The number of bits in the SSB index is 8 bits, and the 4th bit is used to (First bit) indicates the 7th bit of the SSB index from low to high, the 5th bit (First bit) indicates that the SSB index is from low to high. In the case of the 8th bit, the terminal device Parse and get the 7th bit from low to high corresponding to the SSB index, and the 5th bit Parse and get the 8th bit from low to high corresponding to the SSB index.

[0148] The number of bits in the SSB index is 8, and the 5th bit is used to (First bit) indicates the SSB index from low to high, 7th bit, through 4th bit (First bit) indicates that the SSB index is from low to high. In the case of the 8th bit, the terminal device Parse and get the 7th bit from low to high corresponding to the SSB index, and the 4th bit Parse and get the 8th bit from low to high corresponding to the SSB index.

[0149] S1022. The terminal device determines the relative position of the SSB based on the target SSB mode.

[0150] Among them, the target SSB mode stipulates the time distribution rules of multiple SSBs within the SSB cycle.

[0151] It should be noted that different target SSB modes determine the relative position of the SSB on the time axis. The relative position of the SSB refers to the relative timing position of the SSB in the SSB cycle, that is, the time window in which the SSB is located in the SSB cycle.

[0152] The terminal device can calculate the relative position of the SSB in the entire SSB cycle based on the SSB index and the distribution rule of the target SSB pattern.

[0153] S1023. The terminal device determines the half-frame number and the system frame number corresponding to the SSB in the SSB period according to the relative position of the SSB.

[0154] It should be noted that one SSB cycle spans multiple system frames or multiple half-frames. The terminal device can deduce the number of the half-frame where the SSB is located and the number of the system frame in the SSB cycle based on the relative position of the SSB.

[0155] The system frame number refers to the position of a system frame in the current SSB cycle, that is, the sequential number of the system frame in the current SSB cycle.

[0156] It should be noted that the SSB cycle includes multiple system frames, and the system frame numbers of the multiple system frames start from 0 and increase sequentially.

[0157] For example, the SSB period is 50 milliseconds and each system frame is 10 milliseconds. The SSB period includes 5 system frames, and the 5 system frames are numbered 0, 1, 2, 3, and 4 respectively.

[0158] The half-frame number refers to the position of a half-frame in the current SSB cycle, and is used to further refine the time granularity of the system frame number. The half-frame numbers of multiple half-frames in the SSB cycle start from 0 and increase in sequence.

[0159] It should be noted that the number of half-frame numbers in the SSB period is twice the number of system frame numbers.

[0160] For example, the SSB cycle is 50 milliseconds and each half frame is 5 milliseconds. The SSB cycle contains 10 half frames, and the 10 half frames are numbered 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 respectively.

[0161] S1024. The terminal device determines the lowest bit of the half-frame number and the system frame number corresponding to the SSB based on the start time of the SSB cycle, and the number of the half-frame and the system frame corresponding to the SSB in the SSB cycle.

[0162] Among them, the terminal device can deduce the half-frame number corresponding to the SSB based on the starting time of the SSB cycle and the number of the half-frame corresponding to the SSB in the SSB cycle.

[0163] Based on the start time of the SSB cycle and the number of the system frame corresponding to the SSB in the SSB cycle, the terminal device can deduce the lowest bit of the system frame number corresponding to the SSB.

[0164] In the embodiment of the present application, first, the terminal device determines the SSB index corresponding to the SSB based on the PBCH and the demodulation reference signal, and determines the relative position of the SSB in the SSB period in combination with the target SSB mode; secondly, the relative position of the SSB is used to calculate the number of the half frame corresponding to the SSB in the SSB period and the number of the system frame; finally, the lowest bit of the half frame number and the system frame number corresponding to the SSB is derived in combination with the start time of the SSB period, the number of the half frame corresponding to the SSB in the SSB period and the number of the system frame. This method realizes the accurate association of the lowest bit of the SSB index, half frame number and system frame number corresponding to the SSB received from the SSB, which not only improves the accuracy and efficiency of time synchronization, but also reduces signaling overhead, adapts to the high-precision synchronization requirements in complex scenarios, and provides technical support for resource allocation and communication quality assurance in 5G NR networks.

[0165] In the above embodiment, the number of bits in the SSB index is 7 bits, and the 4th bit is used to (First bit) indicates the SSB index from low to high 7th bit, 5th bit It is still used to indicate the half-frame number that it originally needs to indicate. The terminal device uses the 4th bit Parse and get the 7th bit from low to high corresponding to the SSB index; the terminal device gets the 5th bit By parsing, you can directly get the half-frame number corresponding to SSB.

[0166] In this case, the terminal device only needs to determine the number of the system frame corresponding to the SSB in the SSB cycle according to the relative position of the SSB, and determine the lowest bit of the system frame number corresponding to the SSB according to the start time of the SSB cycle and the number of the system frame corresponding to the SSB in the SSB cycle.

[0167] In the above embodiment, the number of bits in the SSB index is 7 bits, and the 5th bit is (First bit) indicates the 7th bit of the SSB index from low to high, the 4th bit It is still used to indicate the lowest bit of the system frame number that it originally needs to indicate. The terminal device Parse and get the 7th bit from low to high corresponding to the SSB index; the terminal device gets the 4th bit By parsing, we can directly get the lowest bit of the system frame number corresponding to SSB.

[0168] In this case, the terminal device only needs to determine the number of the half frame corresponding to the SSB in the SSB cycle according to the relative position of the SSB, and determine the half frame number corresponding to the SSB according to the start time of the SSB cycle and the number of the half frame corresponding to the SSB in the SSB cycle.

[0169] In another possible implementation, the base station sends the additional information to the terminal device through dedicated signaling.

[0170] The additional information is used to indicate the lowest bit of the half-frame number and the system frame number corresponding to the SSB.

[0171] It should be noted that the terminal device parses the received SSB based on the indication information sent by the base station, or the usage of the M first bits pre-agreed between the base station and the terminal device through the protocol, to obtain the SSB index. At the same time, the terminal device parses the additional information sent by the base station to obtain the lowest bit and half frame number of the system frame number corresponding to the SSB.

[0172] In another possible implementation, the base station embeds a mapping rule in the system information block so that the terminal device determines the half-frame number corresponding to the SSB and the lowest bit of the system frame number according to the mapping rule.

[0173] The mapping rule is used to indicate the mapping relationship between the SSB and the lowest bit of the half-frame number and the system frame number.

[0174] It should be noted that the terminal device parses the received SSB based on the indication information sent by the base station, or the usage of the M first bits pre-agreed between the base station and the terminal device through the protocol, to obtain the SSB index. At the same time, the terminal device parses the system information block sent by the base station, and can determine the lowest bit of the half-frame number and the system frame number corresponding to the SSB according to the mapping rules carried in the system information block.

[0175] In the above embodiment, the target time is related to the start time of the system frame. Next, the target time is described in detail.

[0176] In a possible embodiment, when M is 1 and the first bit is the 5th bit of the additional payload bit, the target time is the start time of the first half frame of the system frame, or the start time of the second half frame of the system frame.

[0177] The first half frame refers to half frame 0 of the system frame, and the second half frame refers to half frame 1 of the system frame.

[0178] It should be noted that the number of bits in the SSB index is 7, and the 5th bit Indicates the SSB index from low to high bit 7, bit 4 It is still used to indicate the lowest bit of the system frame number that it originally needs to indicate. Therefore, it is only necessary to stipulate that the target time is related to the start time of the half frame of the system frame so that the terminal device can deduce the half frame number corresponding to the SSB.

[0179] Specifically, the target time may be any target time specified in Regulation 1-1 or Regulation 1-2.

[0180] Provision 1-1, the target time is the start time of the first half frame of the system frame. That is, when the start time of the SSB cycle is aligned with the start time of the first half frame of the system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0181] Provision 1-2, the target time is the start time of the second half frame of the system frame. That is, when the start time of the SSB cycle is aligned with the start time of the second half frame of the system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0182] When the target time is the target time specified by 1-1, the half-frame numbers of the half-frames in the SSB cycle are in chronological order: 0, 1, 0, 1, 0, 1... At this time, if the number of the half-frame corresponding to SSB in the SSB cycle is an even number, the half-frame number corresponding to SSB is 0; if the number of the half-frame corresponding to SSB in the SSB cycle is an odd number, the half-frame number corresponding to SSB is 1.

[0183] When the target time is the target time specified by 1-2, the half-frame numbers of the half-frames in the SSB cycle are in chronological order: 1, 0, 1, 0, 1, 0... At this time, when the number of the half-frame corresponding to the SSB is an even number, the half-frame number corresponding to the SSB is 1; when the number of the half-frame corresponding to the SSB is an odd number, the half-frame number corresponding to the SSB is 0.

[0184] For example, Figure 4 A schematic diagram of the relationship between an SSB period, an SSB index, a half-frame number, and a system frame provided in an embodiment of the present application, such as Figure 4As shown, the application condition of SSB is a non-terrestrial network, and the subcarrier spacing is 30kHz; the target SSB mode is: in one SSB cycle, the first half frame of every 10 milliseconds contains 8 candidate SSBs, and the SSB indexes are arranged in chronological order throughout the SSB cycle. The bit width of the SSB index is 7 bits, and a maximum of 128 SSB indexes can be indicated.

[0185] When the start time of the SSB cycle is aligned with the start time of the first half frame of the system frame, if the terminal device detects that the SSB index of the SSB is 0, then according to the target SSB mode, it can be determined that the SSB is located in the first half frame in the SSB cycle, that is, the half frame corresponding to the SSB in the SSB cycle is numbered 0. At this time, the half frame number of the SSB is 0.

[0186] If the terminal device detects that the SSB index of the SSB is 10, then according to the target SSB mode, it can be determined that the SSB is located in the third half frame in the SSB cycle, that is, the half frame number corresponding to the SSB in the SSB cycle is 2. At this time, the half frame number of the SSB is 0.

[0187] If the terminal device detects that the SSB index of the SSB is 127, then according to the target SSB mode, it can be determined that the SSB is located in the 31st half frame in the SSB cycle, that is, the half frame number corresponding to the SSB in the SSB cycle is 30. At this time, the half frame number of the SSB is 0.

[0188] When M is 1 and the first bit is the 4th bit of the additional payload bit, the target time is the start time of any half frame of the first system frame, or the start time of any half frame of the second system frame.

[0189] The first system frame is a system frame whose system frame number is an even number, and the second system frame is a system frame whose system frame number is an odd number.

[0190] It should be noted that the number of bits in the SSB index is 7, and the 4th bit Indicates the SSB index from low to high bit 7, bit 5 It is still used to indicate the half-frame number that it originally needs to indicate. Therefore, it only needs to be agreed that the target time is related to the start time of the system frame so that the terminal device can deduce the lowest bit of the system frame number corresponding to the SSB.

[0191] Specifically, the target time may be any target time specified in Regulation 2-1 or Regulation 2-2.

[0192] Regulation 2-1: The target time is the start time of any half frame of the system frame (first system frame) whose system frame number is an even number. That is, when the start time of the SSB cycle is aligned with the start time of any half frame of the first system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0193] It should be noted that when the target time is the target time specified as 2-1, the base station can actively select the start time of the SSB cycle to be aligned with the start time of the first half frame of the first system frame, or actively select the start time of the SSB cycle to be aligned with the start time of the second half frame of the first system frame.

[0194] Regulation 2-2: The target time is the start time of any half frame of the system frame (second system frame) whose system frame number is an odd number. That is, when the start time of the SSB cycle is aligned with the start time of any half frame of the second system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0195] It should be noted that when the target time is the specified target time 2-2, the base station can actively select the start time of the SSB cycle to be aligned with the start time of the first half frame of the second system frame, or actively select the start time of the SSB cycle to be aligned with the start time of the second half frame of the second system frame.

[0196] When the target time is the target time specified in Regulation 2-1, the lowest bit of the system frame number of the system frame in the SSB period is, in chronological order: 0, 1, 0, 1, 0, 1... At this time, if the number of the system frame corresponding to SSB in the SSB period is an odd number, the lowest bit of the system frame number corresponding to SSB is 0; if the number of the system frame corresponding to SSB in the SSB period is an even number, the lowest bit of the system frame number corresponding to SSB is 1.

[0197] When the target time is the target time specified in regulation 2-2, the lowest bit of the system frame number of the system frame in the SSB period is 1, 0, 1, 0, 1, 0... in chronological order. At this time, if the number of the system frame corresponding to SSB in the SSB period is an odd number, the lowest bit of the system frame number corresponding to SSB is 1; if the number of the system frame corresponding to SSB in the SSB period is an even number, the lowest bit of the system frame number corresponding to SSB is 0.

[0198] When M is 2, and one first bit is the 5th bit and the other first bit is the 4th bit, the target time is the start time of the first half frame of the first system frame, the start time of the second half frame of the first system frame, the start time of the first half frame of the second system frame, or the start time of the second half frame of the second system frame.

[0199] Among them, when M is 2, that is, the number of bits of the SSB index is 8, the 4th bit can be used Indicates the SSB index from low to high bit 7 and through bit 5 Indicates the SSB index from low to high bit 8; can also be through the 5th bit Indicates the SSB index from low to high bit 7 and through bit 4 Indicates the 8th bit of the SSB index from low to high. At this time, the 4th bit No longer indicates the lowest bit of the system frame number that it was supposed to indicate, bit 5 Therefore, it is necessary to agree that the target time is related to the start time of the system frame and the half frame of the system frame, so that the terminal device can deduce the half frame number corresponding to the SSB and the lowest bit of the system frame number.

[0200] Specifically, the target time may be any target time specified in Regulation 3-1, Regulation 3-2, Regulation 3-3 and Regulation 3-4.

[0201] Provision 3-1: The target time is the start time of the first half frame of the first system frame. That is, when the start time of the SSB cycle is aligned with the start time of the first half frame of the first system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0202] Provision 3-2: The target time is the start time of the second half frame of the first system frame. That is, when the start time of the SSB cycle is aligned with the start time of the second half frame of the first system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0203] Provision 3-3: The target time is the start time of the first half frame of the second system frame. That is, when the start time of the SSB cycle is aligned with the start time of the first half frame of the second system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0204] Provision 3-4: The target time is the start time of the second half frame of the second system frame. That is, when the start time of the SSB cycle is aligned with the start time of the second half frame of the second system frame, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode.

[0205] When the target time is the target time specified in Regulation 3-1, the lowest bit of the system frame number of the system frame in the SSB cycle is 0, 1, 0, 1, 0, 1… in chronological order, and the half-frame number of the half-frame in the SSB cycle is 0, 1, 0, 1, 0, 1… in chronological order. At this time, if the number of the system frame corresponding to SSB in the SSB cycle is an even number, the lowest bit of the system frame number corresponding to SSB is 0; if the number of the system frame corresponding to SSB in the SSB cycle is an odd number, the lowest bit of the system frame number corresponding to SSB is 1; if the number of the half-frame corresponding to SSB in the SSB cycle is an even number, the half-frame number corresponding to SSB is 0; if the number of the half-frame corresponding to SSB in the SSB cycle is an odd number, the half-frame number corresponding to SSB is 1.

[0206] When the target time is the target time specified in Regulation 3-2, the lowest bit of the system frame number of the system frame in the SSB cycle is 0, 1, 0, 1, 0, 1… in chronological order, and the half-frame number of the half-frame in the SSB cycle is 1, 0, 1, 0, 1, 0… in chronological order. At this time, if the number of the system frame corresponding to SSB in the SSB cycle is an even number, the lowest bit of the system frame number corresponding to SSB is 0; if the number of the system frame corresponding to SSB in the SSB cycle is an odd number, the lowest bit of the system frame number corresponding to SSB is 1; if the number of the half-frame corresponding to SSB in the SSB cycle is an even number, the half-frame number corresponding to SSB is 1; if the number of the half-frame corresponding to SSB in the SSB cycle is an odd number, the half-frame number corresponding to SSB is 0.

[0207] When the target time is the target time specified in Regulation 3-3, the lowest bit of the system frame number of the system frame in the SSB cycle is 1, 0, 1, 0, 1, 0… in chronological order, and the half-frame number of the half-frame in the SSB cycle is 0, 1, 0, 1, 0, 1… in chronological order. At this time, if the number of the system frame corresponding to SSB in the SSB cycle is an even number, the lowest bit of the system frame number corresponding to SSB is 1; if the number of the system frame corresponding to SSB in the SSB cycle is an odd number, the lowest bit of the system frame number corresponding to SSB is 0; if the number of the half-frame corresponding to SSB in the SSB cycle is an even number, the half-frame number corresponding to SSB is 0; if the number of the half-frame corresponding to SSB in the SSB cycle is an odd number, the half-frame number corresponding to SSB is 1.

[0208] When the target time is the target time specified in provision 3-4, the lowest bit of the system frame number of the system frame in the SSB cycle is 1, 0, 1, 0, 1, 0... in chronological order, and the half-frame number of the half-frame in the SSB cycle is 1, 0, 1, 0, 1, 0... in chronological order. At this time, if the number of the system frame corresponding to SSB in the SSB cycle is an even number, the lowest bit of the system frame number corresponding to SSB is 1; if the number of the system frame corresponding to SSB in the SSB cycle is an odd number, the lowest bit of the system frame number corresponding to SSB is 0; if the number of the half-frame corresponding to SSB in the SSB cycle is an even number, the half-frame number corresponding to SSB is 1; if the number of the half-frame corresponding to SSB in the SSB cycle is an odd number, the half-frame number corresponding to SSB is 0.

[0209] For example, Figure 5 A schematic diagram of the relationship between an SSB period, an SSB index, a half-frame number, a system frame, and the lowest bit of the system frame number provided in an embodiment of the present application is shown in FIG. Figure 5 As shown in the figure, the application condition of SSB is non-terrestrial network, and the subcarrier spacing is 30kHz subcarrier spacing; the target SSB mode is: in one SSB cycle, there are 8 candidate SSBs in each half frame of 5 milliseconds, and the SSB index is arranged in chronological order in the entire SSB cycle. The bit width of the SSB index is 8 bits, and a maximum of 256 SSB indexes can be indicated. SFN(1) indicates the first lowest bit of the system frame number corresponding to the SSB.

[0210] When the start time of the SSB cycle is aligned with the target time specified in Regulation 3-1, if the terminal device detects that the SSB index of the SSB is 0, then according to the target SSB mode, it can be determined that the SSB is located in the first half frame in the SSB cycle, that is, the half frame corresponding to the SSB in the SSB cycle is numbered 0. At this time, the half frame number of the SSB is 0; the SSB is located in the first system frame in the SSB cycle, that is, the system frame corresponding to the SSB in the SSB cycle is numbered 0, and the lowest bit of the system frame number corresponding to the SSB is 0.

[0211] If the terminal device detects that the SSB index of SSB is 10, then according to the target SSB mode, it can be determined that the SSB is located in the second half frame in the SSB cycle, that is, the half frame corresponding to the SSB in the SSB cycle is numbered 1, the half frame number of SSB is 1, and the SSB is located in the first system frame in the SSB cycle, the system frame corresponding to the SSB in the SSB cycle is numbered 0, and the lowest bit of the system frame number corresponding to the SSB is 0.

[0212] If the terminal device detects that the SSB index of SSB is 255, then according to the target SSB mode, it can be determined that the SSB is located in the 32nd half frame in the SSB cycle, that is, the half frame corresponding to the SSB in the SSB cycle is numbered 31, the half frame number of SSB is 1, and the SSB is located in the 16th system frame in the SSB cycle, the system frame corresponding to the SSB in the SSB cycle is numbered 15, and the lowest bit of the system frame number corresponding to the SSB is 1.

[0213] In the above embodiment, unless otherwise specified, the least significant bit of the system frame number corresponding to the SSB refers to the first least significant bit of the system frame number corresponding to the SSB.

[0214] Figure 6 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. Figure 6 As shown, the communication device 600 provided in this embodiment can exist independently, and the communication device 600 can also be called an SSB index indication device, which is used to implement the operations corresponding to the base station or terminal device in the above method embodiment.

[0215] The communication device 600 may include: a transceiver module 601 and a processing module 602. The processing module 602 is used to perform data processing, and the transceiver module 601 may implement corresponding communication functions. The transceiver module 601 may also be called a communication interface or a communication unit.

[0216] Optionally, the communication device 600 may also include a storage unit, which can be used to store instructions and / or data, and the processing module 602 can read the instructions and / or data in the storage unit so that the communication device 600 implements the steps implemented by the base station or terminal device in the aforementioned method embodiment.

[0217] The transceiver module 601 is used to perform reception-related operations of the base station or terminal device in the above method embodiment, and the processing module 602 is used to perform processing-related operations of the base station or terminal device in the above method embodiment.

[0218] Optionally, the transceiver module 601 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiment. The receiving module is used to perform the receiving operation in the above method embodiment.

[0219] It should be noted that the communication device 600 may include a sending module but not a receiving module. Alternatively, the communication device 600 may include a receiving module but not a sending module. Specifically, it depends on whether the above solution executed by the communication device 600 includes a sending action and a receiving action.

[0220] As an example, the communication device 600 is used to execute the above Figure 1 Actions performed by the base station in the illustrated embodiment.

[0221] The communication device 600 may include: a transceiver module 601 and a processing module 602 .

[0222] The transceiver module 601 is used for the base station to send a synchronization signal block SSB to the terminal device. The SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH. The PBCH and the demodulation reference signal indicate the SSB index corresponding to the SSB in a preset manner. Wherein, when the number of bits of the SSB index is greater than the first preset number of bits, the preset manner is: the SSB index is jointly indicated by M first bits, N second bits and the demodulation reference signal; the M first bits and the N second bits are bits in the additional payload bits of the PBCH, M is 1 or 2, and N is 3.

[0223] It should be understood that the execution of the above corresponding processes by each module has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0224] The processing module 602 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 601 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 601 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0225] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 7 As shown, the electronic device 700 provided in this embodiment includes: a memory 701 and a processor 702 .

[0226] The memory 701 may be an independent physical unit, and may be connected to the processor 702 via a bus 703. The memory 701 and the processor 702 may also be integrated together and implemented by hardware. The memory 701 is used to store program instructions, and the processor 702 calls the program instructions to execute the operations performed by the base station or the terminal device in any of the above method embodiments.

[0227] Optionally, when part or all of the methods of the above embodiments are implemented by software, the electronic device 700 may also include only a processor 702. The memory 701 for storing programs is located outside the electronic device 700, and the processor 702 is connected to the memory through circuits / wires for reading and executing the programs stored in the memory. The processor 702 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 702 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0228] The memory 701 may include a volatile memory, such as a random-access memory (RAM); the memory may also include a non-volatile memory, such as a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above types of memory.

[0229] Exemplarily, the present application provides a chip, comprising: an interface circuit and a logic circuit, wherein the interface circuit is used to receive signals from other chips outside the chip and transmit them to the logic circuit, or to send signals from the logic circuit to other chips outside the chip, and the logic circuit is used to execute the operations performed by the base station or terminal device in the above method embodiments.

[0230] Exemplarily, the present application provides a computer-readable storage medium on which computer program instructions are stored. The computer program instructions are executed by a processor of an electronic device so that the electronic device performs the operations performed by the base station or terminal device in the above method embodiments.

[0231] Exemplarily, the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the operations executed by the base station or terminal device in the above method embodiments.

[0232] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A SSB index indication method, characterized in that: The method comprises: The base station sends a synchronization signal block SSB to the terminal device, where the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate an SSB index corresponding to the SSB in a preset manner; Among them, when the number of bits of the SSB index is greater than the first preset number of bits, the preset method is: the SSB index is jointly indicated by M first bits, N second bits and the demodulation reference signal; the M first bits and the N second bits are bits in the additional payload bits of the PBCH, M is 1 or 2, and N is 3.

2. The method according to claim 1, characterized in that The base station sends a synchronization signal block SSB to the terminal device, including: When the start time of the SSB cycle is aligned with the target time, the base station sends the SSB to the terminal device based on the SSB cycle and the target SSB mode, so that the terminal device determines the SSB index, half-frame number and the lowest bit of the system frame number corresponding to the SSB based on the SSB, the target SSB mode and the start time of the SSB cycle; wherein the target time is a time associated with the start time of the system frame and / or the half-frame of the system frame.

3. The method according to claim 1, characterized in that Before the base station sends a synchronization signal block SSB to the terminal device, the method further includes: The base station sends indication information to the terminal device, and the indication information is used to indicate the purpose of the M first bits; wherein the purpose of the first bit includes: the first bit is used to indicate the lowest bit or half-frame number of the system frame number, or the first bit is used to indicate the SSB index.

4. A SSB index indication method, characterized in that: The method comprises: The terminal device receives a synchronization signal block SSB sent by a base station, wherein the SSB includes a physical broadcast channel PBCH and a demodulation reference signal of the PBCH, and the PBCH and the demodulation reference signal indicate an SSB index corresponding to the SSB in a preset manner; Among them, when the number of bits of the SSB index is greater than the preset number of bits, the preset method is: the SSB index is jointly indicated by M first bits, N second bits and the demodulation reference signal; the M first bits and the N second bits are bits in the additional payload bits of the PBCH, M is 1 or 2, and N is 3.

5. The method according to claim 4, characterized in that The SSB is sent by the base station to the terminal device based on the SSB cycle and the target SSB mode when the start time of the SSB cycle is aligned with the target time; wherein the target time is a time associated with the start time of the system frame and / or the half frame of the system frame.

6. The method according to claim 5, characterized in that After the terminal device receives the synchronization signal block SSB sent by the base station, the method further includes: The terminal device determines the lowest bit of the SSB index, half-frame number and system frame number corresponding to the SSB based on the SSB, the target SSB mode and the starting time of the SSB cycle.

7. The method according to claim 6, characterized in that The terminal device determines the lowest bit of the SSB index, the half frame number, and the system frame number corresponding to the SSB based on the SSB, the target SSB mode, and the start time of the SSB cycle, including: The terminal device determines the SSB index corresponding to the SSB based on the PBCH and the demodulation reference signal of the SSB; The terminal device determines the relative position of the SSB based on the target SSB pattern; The terminal device determines the number of the half frame and the number of the system frame corresponding to the SSB in the SSB period according to the relative position of the SSB; The terminal device determines the lowest bit of the half-frame number and the system frame number corresponding to the SSB based on the start time of the SSB cycle, and the number of the half-frame and the system frame number corresponding to the SSB in the SSB cycle.

8. The method according to claim 2 or 5, characterized in that: When M is 1 and the first bit is the fifth bit of the additional payload bit, the target time is the start time of the first half frame of the system frame, or the start time of the second half frame of the system frame; When M is 1 and the first bit is the 4th bit of the additional payload bit, the target time is the start time of any half frame of the first system frame, or the start time of any half frame of the second system frame; wherein the first system frame is the system frame with an even system frame number, and the second system frame is the system frame with an odd system frame number; When M is 2, and one of the first bits is the 5th bit and the other of the first bits is the 4th bit, the target time is the starting time of the first half frame of the first system frame, the starting time of the second half frame of the first system frame, the starting time of the first half frame of the second system frame, or the starting time of the second half frame of the second system frame.

9. A communication device, characterized in that: The device comprises: a module for implementing the method of any one of claims 1 to 3 and claim 8, or a module for implementing the method of any one of claims 4 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed, the method according to any one of claims 1 to 3 and claim 8 is implemented, or the method according to any one of claims 4 to 8 is implemented.

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